Cayin HA300 MK2

Vacuum Tube:
Genelex PX300B x2
Tung-Sol 6SN7GTB x 2
RCA 22DE4 x 4

Headphone Output Options: 4-pin XLR (BAL), 4.4mm (BAL), 6.35mm (SE)

Volume Control: Custom ALPS 41-steps potentiometer with MUSES72320 2-Channel Resistance Ladder Electronic Volume Controller

Headphone Impedance setting: L: 8Ω~64Ω; M: 65Ω-250Ω; H: 251Ω~600Ω

Rated Ouput (mW per channel at different impedance setting):
XLR4 (BAL): 2000mW (L), 2400mW (M), 6000mW (H)
4.4mm (BAL): 1400mW (L), 2200mW (M), 5400mW (H)
6.35mm (SE): 1200mW (L), 2200mW (M), 5000mW (H)

Other changes:
Enhanced anti-shock anti-interference design
60sec startup delay circuit